package top.tagao.ref_05_getObjectNew;

import org.junit.Test;
import top.tagao.ref_05_getObjectNew.service.Person;

import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

/**
 * @author fu-xiao-liu
 * @Date 2022/3/25 18:47
 * 获取运行时类的其他结构
 */
public class OtherGetObjectNew {


    /**
     * @date 获取构造器结构
     */
    @Test
    public void test1() {
        Class clazz = Person.class;
        //getConstructors():获取当前运行时类中声明为public的构造器
        Constructor[] constructors = clazz.getConstructors();
        for (Constructor c : constructors) {
            System.out.println(c);
        }

        System.out.println();
        //getDeclaredConstructors():获取当前运行时类中声明的所有的构造器
        Constructor[] declaredConstructors = clazz.getDeclaredConstructors();
        for (Constructor c : declaredConstructors) {
            System.out.println(c);
        }
    }

    /**
     * @date 获取运行时类的父类
     */
    @Test
    public void test2() {
        Class clazz = Person.class;

        Class superclass = clazz.getSuperclass();
        System.out.println(superclass);
    }

    /**
     * @date 获取运行时类的带泛型的父类
     */
    @Test
    public void test03() {
        Class clazz = Person.class;
        Type genericSuperclass = clazz.getGenericSuperclass();
        System.out.println(genericSuperclass);
    }

    /**
     * @date 获取运行时类的带泛型的父类的泛型
     */
    @Test
    public void test04() {
        Class clazz = Person.class;

        Type genericSuperclass = clazz.getGenericSuperclass();
        ParameterizedType paramType = (ParameterizedType) genericSuperclass;
        //获取泛型类型
        Type[] actualTypeArguments = paramType.getActualTypeArguments();
        System.out.println(((Class) actualTypeArguments[0]).getName());
    }

    /**
     * @return null
     * @date 获取运行时类实现的接口
     */
    @Test
    public void test5() {
        Class clazz = Person.class;

        Class[] interfaces = clazz.getInterfaces();
        for (Class c : interfaces) {
            System.out.println(c);
        }
        System.out.println();

        //获取运行时类的父类实现的接口
        Class[] interfaces1 = clazz.getSuperclass().getInterfaces();
        for (Class c : interfaces1) {
            System.out.println(c);
        }
    }

    /**
     * @date  获取运行时类的包
     */
    @Test
    public void test6(){
        Class clazz = Person.class;

        Package pack = clazz.getPackage();
        System.out.println(pack.getName());
    }

    /**
     * @date  获取运行时类声明的注解
     */
    @Test
    public void test7(){
        Class clazz = Person.class;

        Annotation[] annotations = clazz.getAnnotations();
        for(Annotation annos : annotations){
            System.out.println(annos);
        }
    }
}